Add support for specifying a default for all datepicker toggle icons

[EdricChan03]

Please describe the feature you would like to request.

Provide support for using an injection token for specifying the icon of datepicker toggles.

What is the use-case or motivation for this proposal?

Currently, I am migrating my icons to use the new outlined Material Icons (https://fonts.googleapis.com/css?family=Material+Icons+Outlined) in my app. However, I have to change the icons by specifying the matDatePickerToggleIcon to use for all datepicker toggles.

Having an easy way of specifying the toggle icon to be used for all of the datepicker toggles would be useful.

Is there anything else we should know?

NIL

[crisbeto]

I don't think we can do this with an injection token, because the matDatePickerToggleIcon is passed in as an element.

[angular-robot]

Just a heads up that we kicked off a community voting process for your feature request. There are 20 days until the voting process ends.

Find more details about Angular's feature request process in our documentation.

[angular-robot]

Thank you for submitting your feature request! Looks like during the polling process it didn't collect a sufficient number of votes to move to the next stage.

We want to keep Angular rich and ergonomic and at the same time be mindful about its scope and learning journey. If you think your request could live outside Angular's scope, we'd encourage you to collaborate with the community on publishing it as an open source package.

You can find more details about the feature request process in our documentation.